2023-07-18 19:27:39, 光电行业都会关注 北京卓立汉光仪器有限公司
碳基无机钙钛矿太阳电池
钙钛矿太阳能电池(PSCs)因其高效率和低成本的优势获得广泛关注与研究。然而,钙钛矿在成核和晶体生长的过程中不可避免地会形成缺陷,被认为是制约器件光伏性能和稳定性的重要原因。在近几年的研究中,有机卤化铵盐常被用于钝化钙钛矿的表面缺陷,其作用机理大致可分为分子钝化机制和LD/3D异质结机制。通过化学反应形成LD/3D异质结构不仅可以钝化点缺陷,还可以通过消除不需要的表面晶相和修复针孔、裂纹等形态缺陷来重建3D钙钛矿表面,被认为是一种比分子钝化更强大的界面工程方法。
Figure 1. a) XRD patterns of CsPbI3 films without (w/o) and with ChI treatment. b) Temporal evolution of the suspicious peaks from XRD with ChI treatment under ambient atmosphere (RH = ~80%). c) XRD patterns of ChI-PbI2 crystal powder and simulated ChPbI3. d) Schematic crystal structure of hexagonal ChPbI3. e) ToF-SIMS depth profile of Ch+, Pb2+, I− and Ti4+ in CsPbI3/TiO2 film with ChI treatment.
Figure 2. a) Evolution of XRD patterns of CsPbI3 films with ChI treatment over time at room temperature (25 °C). b) XRD patterns of CsPbI3 films without and with ChI treatment annealed at different temperature for 15 min. c) PL spectra for CsPbI3 films with ChI treatment over time at room temperature. d) PL spectra for 3D-film and 1D/3D-film. e) PL delay curves of 3D-film and 1D/3D-film.
Figure 3. a) Photos showing color changes of 3D- and 1D/3D-film at RH=40~50% over time. Evolution of XRD patterns of b) 3D- and c) 1D/3D-film at RH=40~50% over time. The color bar on the left side represents time, and the color bar on the right side indicates the XRD intensity. d) XRD patterns of ChPbI3 crystals before and after soaking in water for 6 h. e) XRD patterns of 3D-film containing δ-CsPbI3 blemish before and after ChI treatment. f) Schematic illustration of inhibition of δ-phase by ChI treatment on CsPbI3 surface.
Figure 4. a) Statistic distribution of Voc and PCE of C-PSCs based on various concentrations of ChI solution based on 30 individual devices. b) Forward and reverse J–V curves and c) SPO curves of 3D- and 1D/3D-cells. d) Summarized PCE values of reported inorganic C-PSCs. e) Voc dependence on light intensities and f) Mott–Schottky plots of 3D- and 1D/3D-cells.
文章链接:https://onlinelibrary.wiley.com/doi/10.1002/anie.202303486
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